Continuous pickling apparatus



June 18, 1929. H, M. NAUGLE ET AL CONTINUOUS PcKLING APPARATUS I Filed Dec. 19, 1924 2 Sheets-Sheet `lune 18, 1929. H M, NAUGLE ET AL CONTINUOUS PICKLING APPARATUS Filed Dec. 19; 1924 2 Sheets-Sheet m m w 1M, M m d e 1m .Ill S o m au l N mm M. TU. w` NN EAN* RN N ua Mmm n H s U. ww MU. N w. `NN kN r Patented June is, 1929. n

UNITED sTATEs 1,718,063 PATENT OFFICE.

HARRY M. NAUGLE AND ARTHUR J'. TOWNSEND, OF CANTON, OHIO, ASSIGNORS, BY l MESNE ASSIGNMENTS, TO THE AMERICAN ROLLING MILL COMPANY,l OF MIDDLE- TOWN, OHIO, CORPORATION OF OHIO. y

CONTINUOUS ICKLING APPARATUS.

Application l'ed December 19, 1924. Serial No. 757,030.

The invention relates to pickling tanksfor removing oxidation 'and scale from wide st eel strips land the like, while moving endw1se continuously through a dilute solution of sulphuric acid or the like contained in the tank;

and the object of thc improvement is to reduce the length of such tanks and to improve the action of the pickling solution upon the metal. The length -of time required for picklmg a `wide strip of steel by passing it through a chemical solution, according to common practice, requires the use of a trough or tank for containing the solution, of such an extended len th as to render the same inconvenient and un esirable, if not prohibitive, within the ordinary bounds of a manufacturing plant. rlhis diiliculty -is overcome in the present improvement, by providing a rotatable drum 20 in each end ofthe tank over and around which the strip may travel to the under side thereof, .and by providing a guide roll adjacent to the inner side of eachdrum for directing and holding the strip' downward in the solution while passing from one drum to the other.

lThe invention is illustrated in the accompanying drawings' forming part herem?.A in which- Figure 1 is a side elevation showing the improved pickling tank in longitudinal section, and apparatus which is preferably used in connection therewith;

Fig. 2, a plan view of the improved pickling tank; and

Fig. 3, a longitudinal section-of the same on line 3 3, Fig. 2.

\ Similar numerals refer to similar parts throughout thedrawings. A

The apparatus may include a coil box A, 'a strip leveler B, a. traveling s .ot Welder C, a

pickling tank D, a water was er E, eonve'yer rolls F, a double and "shear Gr, and a strip.

coiler H, all arranged -in series, as shown in lFig. 1 of the drawings The coil box A may be of any ordinary construction for holding a coil 10 of a strip 11 of steel vor the like, and permitting the same to unwind for a continuous pickling opera-A tion; and the strip leveler B Imay-include two tion and o eration, for flattening the lsheet and. removlng luneven fullness or buckles which may have been caused by reducing rolls sets of rolls12 of any well known construcvwalls of the tank. The guide rolls 23 are so or other apparatus used in producing the strip. f 55 The spot Welder C may include 'a series of electrodes 13 mounted in a frame 14, supported on a carriage 14 provided with wheels 15, riding on a track 16, together with gripping devices 14 on the front and rear sides of, 60 the frame, for clamping and holding successive strips with their ends overlapped in position between the electrodes for a spot welding operation, while the carriage is traveling forward on the track.

- The pickling tank D may be made of Wood or concrete 17 or other suitable material lined with an aci-d resisting' metal 18 or other like material. The top of the tank may be openv throughout its length and breadth andthe same is made of sufcient lengtha'nd breadth to contain a pickling solution 19 to accommodate a plurality of passes of thestrip 11 in the manner described, asfollows:

' A. rotatable drum 20 and 20. is mounted on 75r a'transverse axis in each end of the drum by means of bearings 21, which maybe formed or secured on the side Walls 17' of the tank. The. drum 20 at the rear end of the tank is preferably located on a normal 'axis trans- 80 verse the longitudinal axis of the tank, and

the drum 2O at the forward end thereof is preferably located upon an axis extending at a slight` angle from normal to the longitudinal axis of the tank, so that the strip* 1-1 will 85 y 5 properly ride around the respective drums.

Each drum is preferably provided Iwith a plurality of annular guide flanges 22 and 22 ,which divide the drum into a plurality of lat- 4eral Sect-lons for receiving successive passes of 90 the strip as it rides around the drums, from one section,y of onel drum -to a corresponding section of the other drum, as illustrated in Fig. 2. The drums are preferably located with their lower sides well submerged in the pickling solution contained in the tank so 'that the strip passing on the lower side of one drum to the lower side of the other drum will pass through the body of the solution.

Adjacent to the inner side of each drum is -mounted a guide roller 23 and 23", the same being mounted parallel to and cooperating with thel corresponding drum and being supported bysuitable bearings 24 on the side positioned that their lower sides are also lov with each other.

catedbeneath the surface of the solution in the tank, and the passes of the strip from the upper side of the forward drum to the upper side of the rear drum are carried below the guide rolls, which serve to direct and hold l the strip immersed within the body of the solution.

The passes ofthe strip from the upper side of the forward drum to the upper side of the rear drum 20 form a series of coplanar passes.A `In a like manner, the passes of the strip from the lower side of the rear drum 20 to the lower side of the forward drum 20', form a similar seriesof coplanar passes. The planes of these series of passes are parallel Furthermore the series of coplanar passes are held in close proximity with each other by means of the guide rolls 23 -and 23', as well shown in Fig. 3.

A series oftransverse skid rods 25 may be secured in the tank for separting the diifer,

ent or alternate` series of passes ofthe strip moving to land fro within the tank; and it is evident that the movement of the passes in reverse directions within the body of the sov lution, serves to agitate the same and cause new particles thereof to contact with the Strip,-

The water washer E may include strip supporting rolls 26 and transverse tubes 27 suitably apertured'for spraying a cleaning water uponthe strip to remove any .acid or other coating which maybe carried thereon from the pickling tank.

The conveyer rolls F may include two stands of power operating pinch rolls 28 arrangedl for drawing a strip through the apparatus and conveying it rearward to the double shear G; and between these rolls may be provided transverse pipes 29 suitably apertured for hot air drying the trips.

The shear G is provided with shearing dies 30 on its front and rear sides and a shearing punch operating between the same for shearing the joint between twostrips in front 'and in rear-of their overlapped ends, so as to neatly disconnect them after the pickling and 'y drying processes are completed.

The strip coiler H may be'of any well known construction for windin the pickled. strip 11 into a coil 10' and it'is preferably provided with an independent motor 32 for this purpose. n

In the operation"l of the apparatus a strip which has Vbeeniattened by the levelerjB and joined to another strip by the spot Welder C, is moved continuously endwise over and around the drums in the endsof the pickling tank D, wherein the foreward passes are directed and held downward in the solution by the-guide rolls; whence the strip is moved endwise through the water washer E by action of the conveyer rolls F, which moves the strip rearward through the double shear G, whereby successive strips may be severed by cutting in front and in rear of the joints, whence the 'strips are wound by the strip coiler K.A

By the improved apparatus the length of the pickling tank may be shortened in proportion to the number of passes made by the strip to and fro aroundt'he drums and under the guide rolls; and in making the passes in reverse directions, the movement of the strip agitates the picklingsolut-ion so as to constantly bring the s urfaceof the strip in con, tact with fresh particles thereof.

Furthermore, a less amount of pic'kling acid is required to fill the shorter tank, there is less difficulty in keeping the same tight and the amount of depreciation and cost of maintenance are both reduced.

lVe claim:

11. Pickling apparatus for steel strips and the like, including a'tank, a pickling solution in the tank. and drums at the ends .of the tank for continuously passing thestrip to and fro through the solution in the tank the axis of one of the drums being inclined from normal to thelongitudinal axis of the tank.

to and fro through the solution in the tank in sustantially the same plane, and transverse skid rods inthe tank .for separating the alternate passes of the strip therein.

' 3. Pickling apparatus for steel strips and the like, including a tank, a pickling solution in the tank, a drum at each end of the tank for continuously passing the strip to and fro through the solution in the tank in a plurality of alternate passes over each drum and means in the tank for separating the alternate passes of the strip therein.

VIn testimony that we claim the above, we y have hereunto subscribed our names.

HARRY M. NAUGLE. ARTHUR J. TOWNSEND. 

